Hi! I'm trying to add tests to my python backend using the python sdk, but I'm getting the following error:

def is_allowed(
        self,
        action: str,
        principal: Principal,
        resource: Resource,
        request_id: Optional[str] = None,
        aux_data: Optional[AuxData] = None,
    ) -> bool:
        """Check permission for a single action
    
        Args:
            action (str): action being performed
            principal (Principal): principal who is performing the action
            resource (Resource): resource on which the action is being performed
            request_id (None|str): request ID for the request (default None)
            aux_data (None|AuxData): auxiliary data for the request
        """
        resp = self.check_resources(
            principal=principal,
            resources=ResourceList().add(resource, {action}),
            request_id=request_id,
            aux_data=aux_data,
        )
    
>       return resp.get_resource(resource.id).is_allowed(action)
E       AttributeError: 'NoneType' object has no attribute 'is_allowed'

I've been looking at the client code and I found that

get_resource

returns

None

when the request fails, but I don't know what is failing.

Interesting... there are two things you can try. • Set

raise_on_error=True

when constructing the Cerbos client. That could give you an idea by throwing an exception. • Set

debug=True

(and maybe

logger

as well) and you should be able to see the requests and responses

Thanks, I will try

You could also try printing out

resp.status_msg

.

Where can I access

resp

?

I am referring to the variable called

resp

you have in the above example.

Ohh, that code above is from the python sdk, I will try to print it

Great! What was it?

I was getting a

400

because I wasn't sending roles in my Principal

I see. Glad you found the issue 🙂